An Anthropologist.
you would call someone who studies economic zoology a Zoologist.
Botanist / herbologist studies plants, people who cultivate cannabis are considered growers
You call someone that studies metal a metallurgist.
A physicist.
a person who studies planets is a planetologist.
There is no special name for someone who studies Hebrew.
florist
Microbiologists
A Zoologist
Brocollogist
malacologist
A physicist.